Message Oracle PLS-00587 - a static method cannot be invoked on an instance value

ERRORa static method cannot be invoked on an instance value
CAUSEAn attempt was made to use an object instance value, not a typename, as the qualifier of the name of a method invocation, but only a typename can be used as the qualifier when calling a static method.
ACTIONUse the typename, not an object instance value, to qualify the name of a method if the method is static.